Heat pumps extract a large volume - air, soil, groundwater - small amounts of heat and add them to sufficient heat for the apartment and water heating. Similar to a refrigerator, only a refrigerant is pumped in a circle and the electrical energy is much lower than the heat energy obtained. Heat pumps in themselves are not necessarily expensive. But electricity is wrongly expensive compared to natural gas, which is why heat pumps are only worthwhile if less heat is needed overall in a well-insulated house. In cold Scandinavia of all places, heat pumps have long since prevailed, while a sham debate is being held in Germany. Wood heaters are at best one (1), as they are less bad than oil and gas. However, they emit ultrafine particles and we need wood for building materials. Windbreak can remain in the forest for biodiversity or be used for chipboard.

Vegan means refraining from fish, meat, milk, cheese and other animal foods. Unthinkable for many people, on the one hand because of the taste, and on the other hand because they consider it unhealthy. To the taste, it can be said: Among the extremely diverse vegan alternatives, something certainly tastes just as good or even better. We just have to try it - from vegan cheese to egg salad to burgers. Many celebrities and athletes are vegan. Vegan is booming. Regarding health, it must be said: Our early ancestors ate healthier than we eat today. There was mixed food with only little meat and fish and also little grain and instead more legumes. If you eat a vegan diet, you have to pay attention to two nutrients: vitamin B12 and unsaturated omega 3 fatty acids. B12 can be bought for sucking (or as an additive in foods that are no longer called organic). Omega 3 fatty acids are available in linseed and algae oil. After a few months vegan, a blood test can show whether there are deficiency symptoms. As a rule, vegans eat healthier and are fitter than others. What else does it bring: In addition to ethical reasons (keeping and killing animals), vegans help to prevent the deforestation of forests, because most areas in the world need the feed. In fact, we will not be able to feed the growing world population in the way we Germans. Vegans also prevent greenhouse gases from the methane emissions of cows, save enormous amounts of drinking water and prevent the pollution of soils, groundwater and waters.

Unlike the vegan diet, a vegetarian diet can also include milk, cheese or eggs. Vegetarian days are healthy, mean less animal husbandry and thus less consumption of land and water. People in the industrialized world consume more than three times more animal products, which according to the EAT-Lancet Commission would be healthy for us and the planet. We don't have to become vegans or vegetarians right away, but maybe just flexitarians.

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.

Organic is extremely important for biodiversity. We have the greatest species extinction since the extinction of the dinosaurs and the consequences are greater than those of climate change. Pesticides and mineral fertilizers endanger our future. In addition, soils from organic farming usually store more carbon and thus help against the climate catastrophe. The counter-argument is often that the yields in organic farming are lower than in industrial agriculture and therefore more forests have to be cut down. This is true, for example, with cereals that are not unrestrictedly healthy. But if we eat less meat, waste less food and eat more healthy legumes, we have plenty of additional space available and can feed the entire world organically and even plant a little more forest. Organic in the canteen or at the kiosk or at company events is of course more expensive - but if it is not exemplified somewhere, what do we expect in the private sector.

Which is better - the organic apple from New Zealand or the sprayed apple from the region? Answer: both wrong. Organic food from the region means less transport and is therefore even better than organic food with wide transport. Organic in the canteen or at the kiosk or at events is of course more expensive - but if it is not exemplified somewhere, what do we expect in the private sector. Sometimes a direct delivery from providers from the region is a way to save costs.

Seasonal organic products in addition to regional organic products also have less energy expenditure for storage. In the respective months, other products are available seasonally, so that we can eat healthy and tasty all year round with little transport and storage effort with regard to a seasonal calendar.

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.

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. Canteens and kiosks and also events can query the demand in advance and thus prevent food from being thrown away. A dish can also be deliberately offered the next day, which advertises the utilization of the leftovers from the previous day.

If you do not have a garage or courtyard entrance with your own socket, you are dependent on charging options in public space and at the workplace. However, the charging options, which were initially underutilized, must first be there, but then people switch to electric cars with a time delay. Providing guests and employees with enough charging stations here is a real competitive advantage.

What has recently been a successful model in some countries and cities is still a problem in Germany: to give cyclists priority over car traffic. The willingness to ride a bike, even in bad weather, is higher than ever. E-cargo bicycles make it possible to at least do without the second car. A company can do a lot from the bicycle shelter with charging possibility via the company bicycle.

At Fair-Trade, we usually think of the label of the same name - which is no longer in disrepute. But there are also other labels - some rather greenwashing, some quite trying to do better. Fair is not always the same as organic and organic is not always fair (but some labels combine both). The importance is immense: fair working conditions in the world ensure less migration, more climate protection and a more peaceful world. Extremely remarkable is the background of chocolate and the connection between child slavery (!) And the common products from Nutella to children's chocolate to the Mars bar: https://edition.cnn.com/world/freedom-project Companies and events can therefore be pioneers for a better world themselves here in the food or in the work clothes or the hand-sewn football.

Many people who earn above average can only do this because others earn below average. The gap between rich and poor is getting bigger and bigger. Consumers complain about cheap wages, but the price increase by 50 cents is rarely accepted. What we deserve is not, as liberals or neoliberals like to think, just a question of diligence. It is the product (!) Out of diligence, skill and the right framework conditions. Anyone who knows many talented and hard-working people who are simply not lucky develops empathy and is willing to pay more, even if it is through tips. Companies can set an example in the case of remuneration, in particular for less well-paid activities within the scope of their possibilities.

Volunteering, whether at the fire brigade, in the sports club or the help in the neighborhood, is enormously important for togetherness and society. Companies can help here to honor volunteering and accompany it through donations.