It is always a consideration whether the further use of an older device does not require less energy or water than the production of a new, energy-efficient device. Therefore, the energy requirement along the entire product life cycle (from production to use to disposal) must be considered. Sometimes someone needs a different device and can't afford a new one - then a used device from someone who has bought a new, more economical device, of course, also makes sense. With some devices, the top values are only achieved with large quantities, i.e. washing machines with a lot of capacity. It is to see whether the top values also apply with lower filling quantities, for example for single households.

LED 'light bulbs' are now available for really all lamps, even with pleasantly warm light colors.

Streaming can hardly be stopped. It is convenient if all data is automatically backed up in the cloud and can be accessed from anywhere, and it is equally convenient if all shipments can be viewed not only at a certain time, but 'on demand'. It can also be argued that computers no longer need such large hard drives and CDs or BlueRays no longer need to be produced. In the end, however, streaming all over the world means a considerable energy demand and the infrastructures for transmission towers devour space and raw materials and they probably also cause harmful radiation. One solution is therefore to give up comfort a bit and perhaps also go more into nature instead of squatting in front of the screen. In detail, there is still the possibility to download something more at home with fiber optic, than on the go with older mobile networks.

We have to use all suitable areas for photovoltaics (PV), as the variants on open spaces restrict nature and agriculture. A trend is PV on stilts, so that it can still be gardened or cultivated underneath. But that costs building material. Photovoltaics has become amazingly inexpensive today thanks to cheap panels from China. Unfortunately, there is hardly any money to make from the feed into the power grid, currently about 8 cents per kWh in Germany. Therefore, PV should always be combined with its own electricity storage (own step, see below) so that as much electricity as possible is consumed by yourself. This then saves approx. 25 to 35 cents per kWh (depending on your tariff), which we would otherwise have to pay to the electricity provider. In this way, your own PV system, adapted to your own electricity consumption, pays off after just a few years. If you have a car, you should take into account its consumption (even if it is not yet an electric car). Then the savings are much bigger. The banks like to give loans for PV, quite often it is also being subsidized. In addition, there are also providers who take over the costs and virtually rent the roof area and offer discounted electricity in return. Such providers then form so-called virtual power plants with other houses and their batteries. For such a dependency, you should inform yourself well about what is best for you.

An electricity storage system primarily helps to maximize the yield of the PV system if the electricity is not fed into the grid for little money, but comes out of the battery in the evening and then allows the full electricity price to be saved. Another advantage may be that some batteries work as an island system in the event of a power outage. The already mentioned virtual power plants then access your battery from the outside and make the electricity available virtually in the neighborhood and compensate you for it. In addition, power grids are stabilized and even with little wind and no sun, we can consume renewable energies. Note on lithium: Like many other raw materials, lithium is often problematic during mining. However, the life cycle assessment must take into account that we can recycle lithium for hundreds of years. In the basement, older lithium batteries from the automotive industry could also come to a second life later or, alternatively, sodium batteries that require more space.

Motion detectors make sense in all rooms including outdoor areas, where we potentially let the light burn for too long, for example in the hallway, basement, garage, etc. Of course, it is important that the light does not stay on for too long.

The area that we need to live means the area that is sealed, the building material that is needed, and the space that needs to be heated - and all this against the background of social justice. When more people live in the household, they share rooms such as kitchen, living room or bathroom. In fact, the per capita area is constantly increasing because more older people live alone and longer in large houses and because there are more single households. Not everyone can now rebuild or move out, but those who take these steps can be proud to reduce the living space.

Thermal insulation is extremely important. Investing here means saving energy and costs. The argument that building will then become too expensive must be clearly put into perspective. One way, of course, is to have to insulate smaller living spaces. The other to become generally more efficient when building. Then ecological building materials will also become affordable. Old houses that can no longer be sensibly insulated are perhaps worth so much more as a new building that financing is not a problem. (Note: the figures are for Germany)

We can use rainwater at least for garden irrigation in the case of unproblematic materials of the roof. With significantly more effort also for washing machine and toilet flushing. Even if it takes quite a long time economically before it's worth it, it's a good thing.

Intelligent ventilation does not mean too late and not too long. It is too late when we get tired when the air is used up, get a headache and the humidity becomes too high. It is too long when the air has already been replaced and is cool, but we also ventilate the materials (walls, furniture) even longer. Heat ultimately means that things or air vibrate. When the air is exchanged, but the objects and walls are still vibrating, the fresh air is quickly heated. Even if the walls get cold, mold can form on them and we need expensive heating energy to make everything vibrate again. By the way, CO2 measuring devices help to ventilate in time and not for too long. However, these should not be a useless gadget, but perhaps used for practice one after the other in the rooms and gladly lent. A nice game is the competition, how good the sense of the people in the room is to ventilate in time and not too long.

Food from the region, from the weekly market and from the farm shop have not been transported far (there are of course also exceptions there) and strengthen the local economy. However, there are also inefficient short transport routes when vehicles with little load drive to the points of sale. E-mobility and cargo bikes can help here. Unfortunately, the regional is often also played out against the organic offer: regional, sprayed with pesticides food is not as good as regional organic food, and regional meat is not as good for the environment as the renunciation of meat.

Legumes are not only an alternative source of vegetable proter to animal products, but also extremely important for world nutrition. They bind nitrogen from the air in the soil and can achieve just as high yields in organic farming as in industrial agriculture. So we have to cut down fewer forests. In addition, legumes are healthier than cereals. Harari describes in Sapiens how we could probably get much older if we didn't eat so much cereal products. After all, legumes are important for bees and biodiversity. Lupine, for example, also grows in northern Germany and can be used for meat substitutes, yogurt, coffee substitutes, ice cream or even noodles.

Fortunately, tap water has long been a trend. There are drinking water dispensers in schools and the students have their drinking bottles with them, and managers also bring their drinking bottles to workshops. Many children do not even get used to the unhealthy sugar drinks. Tap water is more strictly controlled than bottled drinks and saves a lot of energy and packaging. Even with motorhomes or boats or in places with the smell of chlorine in the water, we can save a lot of money, energy and packaging through good and regularly exchanged filters.

Food is wasted from the field to the factories and transport routes to the throw away by us, the restaurants and the supermarkets. This ultimately means that more areas are needed for cultivation and thus forests are cut down and biodiversity is endangered with sprays and fertilizers. We can shop more specifically, throw away goods not only because of the best before date, save food in the household (e.g. freeze bananas or make durable spreads and soups from leftover vegetables yourself), save specifically rescued food (e.g. too small or wrinkled goods) and also donate leftover food in many places, e.g. to the food banks.

There are almost hostile prejudices against electric cars: child labor, coal power, risk of explosion, farmers are expropriated, fear of range, loss of value, etc. It is true: Like every car, electric cars are also a waste of raw materials and energy. But if car, then the electric car is the best solution, because gasoline and diesel perform even worse in all areas. Many studies or Statements by laymen make a mistake: The controversial lithium must not only be counted with its footprint from mining, but this must be reduced by the many times that lithium is recycled again and again in the decades. In addition, what few know: Gasoline contains almost the same amount of electrical energy on 100km for production and transport as it is needed in an electric car for the journey. E-cars would not have to be so expensive and batteries not so big - charging options are more important. Electricity at public charging stations is currently surprisingly expensive, although it would clearly be more important to add the costs of the climate catastrophe and air pollution to the gasoline and diesel price. http://www.imodeler.info/ro? key=Col-EWhyCbIR_KGGP7mXbLw Hydrogen and synthetic fuels in cars are nonsense. There are so-called memes fuelled by individual interests (keyword "Lex Porsche" https://www.cleanthinking.de/lex-porsche-lindner-wissing-e-fuels/), 'ego trolls', which are picked up by 'Troll-Lemmingen', who simply like to be against something and do not want to change. With both fuels, green electricity is first generated and then with loss of efficiency to hydrogen or e-fuel. For e-fuels, carbon is also missing - already today, few airlines that have started with it have a problem buying carbon on the market. Consideo has also gained important insights about hydrogen: https://www.consideo.com/files/consideo/pdfs/papers/eng/ConsideoPaper-BEM-Engl.pdf

Flying is a great experience for most people like experiencing distant places. Flying short distances should rightly lead to 'flight shame' - some countries are planning to ban domestic flights completely. The problem with flying is, on the one hand, that we travel a lot of kilometers, even if the energy requirement per kilometer and person is not so high. On the other hand, greenhouse gases are transported directly to the heights where they harm us. So we should only use the plane for rare long-distance trips and then rather stay longer in the places. Many, on the other hand, fly several times a year, partly within Europe - some even to sustainability conferences or just to spontaneously escape the harsh weather in Germany. Unfortunately, flying is even subsidized and is often cheaper than train or car.

Parent taxis is the name for parents who drive their children to school and to numerous other events by car. There are generally alternatives to school, not always to other activities (sports club, music school, ....). In front of the schools, these parent taxis are a real danger for the other children and annoying for the school buses. It is simply ruthless towards the other students. Parents should at least organize carpools for leisure events.

No question - leaving the car and taking the bike is a proud feeling and healthy. If you don't want to exhaust yourself (for example, on the way to work), you can consider an e-bike. If you have a lot to transport, a cargo bike. Often we can also share a cargo bike with others. And if you shy away from bad weather, you will find great cycling clothing today, which completely refutes the argument.

Consistently separating waste, including green waste, glass and paper, is not as self-evident as can be assumed. Many make little effort here and don't really know what belongs in which bin. But also special waste, such as batteries, incandescent lamps, electrical appliances, etc. must be disposed of properly.

Saving paper helps to protect forests - recycling paper also ultimately means more demand for fresh pulp from trees. We don't even need to print many things in the first place, but can save them on devices that we already have. Banks and insurance companies offer to carry out the correspondence purely electronically and to save a lot of paper. Of course, there is also a big question as to whether we do not consume books and magazines better digitally. Well, if we already have the devices anyway, downloading and saving are the better alternative for the environment. If we buy extra devices and then hardly use them, the ecological footprint of the devices is greater than that of the saved paper. By the way, the winner is the library/lend library. But books are also a nice experience and if we know what's in them, also a nice decoration for our apartments. Magazines, on the other hand, are not very timeless, and if we need articles later, the online search is easier before.

It is hard to believe that the future of our diet depends on the use of pesticides and their influence on insects that have to pollinate our plants. Many pollinators are threatened with extinction and in addition to the purchase of organic, we can offer these insects flowers on our areas. In fact, some plants are neither bee-nor bird-friendly. On the other hand, fruit trees and most vegetables are already great opportunities to promote bees, bumblebees, etc. At the flower meadows there are one- and multi-year-olds.

Green roofs, at least for garages and garden sheds, are a good attempt to do something against the area sealing and species extinction. If the areas are oriented towards the sun - to the east, west or south - it can of course also be occupied with PV modules. For flat roofs, the PV modules can be set up and then still grow a little under them. There are also bifacial solar modules that allow light to pass through or can also generate energy with the scattered light from the back. (where, of course, a green area does not illuminate the backs as a bright sheet metal roof)

Sidewalks can be kept mechanically or by flames weed-free or the herb can also grow sometimes. The beds can be kept mechanically herb-free or laid out from the outset in such a way that herb does not matter. Pesticides are one of the main causes of species extinction and water pollution.

Road salt is convenient and safe, but a considerable burden for pets, the trees and the surface water. Replacing this with split means more effort, but it's worth it.

We afford much of what we afford, because others do it too. What we then have and do goes far beyond what we need to be happy. Therefore, every euro donated on our side is first of all a waiver of consumption. Whether the donated money simply leads to consumption elsewhere can be questioned. What does the youth fire brigade do with the donations, what Greenpeace, what plan Germany, what the riff reporters, etc.? A useful flashing angle is to be considered here so-called sources and sinks. The box of beer is gone for now, a sink. But if it leads to more people wanting to get involved in the youth fire brigade, it is a source of more good. However, many donations are also to be questioned - for example, when it comes to the scandals behind the clothing donations or some organizations spend the most money on administration. However, with a little research and taking into account donation seals, we find great opportunities. By the way, it is also popular not to give your own family gifts in kind, but very concrete donations such as hygiene articles or goats in developing countries. Among other things, Plan-Germany offers this. If then your own kids are proud not to get even more Zeuchs themselves, but to be able to tell their friends what good they have done in the world with their Christmas gift, then we are already in a better world. The bar for the willingness to donate can be one's own prosperity, which the linked online calculator calculates. If you have more than your environment, you should definitely consider donating more.

Even large, conventional clothing stores sometimes take back old clothes and promise to produce new yarns from them. Often the problem is the quality of short-lived clothing, which is then difficult to recycle and yet ends up in the waste incineration plant or on the dump in developing countries. With the points for clothing, if you do not buy conventional cotton, but choose sometimes recycled and sometimes organic cotton, you can give yourself a full 3 points for both.

Vegan shoes and belts are no longer distinguishable from their leather variants. And who pays attention to the fact that the tanning processes do not allow heavy metals to enter the environment or that the leather is certified accordingly? We should be careful with some plastics, such as PVC with plasticizers, which are also not good for the environment.

Leaf vacuums and blowsers are even worse than the idea of mowing small lawns with a large lawn mowing tractor at all and then for hours. Boys with toys. The leaf vacuums and blowers emit noise and ultrafine particles and harm the soil organisms more than rakes or brooms.

Precisely because devices are so inexpensive, we tend to buy all kinds of devices ourselves and not borrow them, whether from the neighbors or from the tool rental company. The large DIY stores now all offer a rental service.

Having something new makes you happy. We are offered more and more technical products, from flashing children's shoes to cheap e-scooters to the grill with a built-in fan. To consider here whether it can also be done without it and how long the devices will last and what the disposal of such electronic waste means emancipates us from the consumer traps.

Firecrackers and fireworks are a problem in every respect: for the animal world, the environment and the people who produce them. The ultrafine particles pollution is horrendous. And all this only because people (mostly men) hope for attention and admiration about this.

Returns have become a big problem - many returns are simply burned because the logistics are more expensive than the goods. Especially with clothing, we should research for detailed size specifications so that the clothing also fits. Simply ordering three sizes and of course sending two back is a waste of energy and resources. But other products would not have to be returned if we researched better beforehand whether they meet our expectations.