Even if a company operates in a sustainable and economical manner, it still causes CO2 emissions. However, this amount of emissions can be measured and recorded. Climate protection then means reducing and avoiding this amount. This can only be done to a certain extent. To become carbon-neutral, companies can offset this unavoidable residual amount through climate protection and carbon offset projects. Then they are CO2-neutral. In this way, companies are also responding to the growing environmental awareness of the population: four out of five Germans pay attention to whether a company is environmentally friendly when making their purchasing decisions. This was the result of a survey on climate protection and consumer behaviour conducted by the consulting firm PwC in 2015. Above all, companies bear more responsibility for climate protection, the respondents said in the study.