Human activities have caused global warming via the emission of greenhouse gases (GHGs). That is now an unequivocal fact. And humankind is suffering the consequences of its own actions in the form of climate change caused by global warming. This warming is escalating rapidly on land, with serious impacts on food production. Japan imports at least 50% of its food. In short, what this means is that the countries producing our food are emitting GHGs attributable to agriculture for Japan's sake. To take steps to combat climate change, we must start by understanding this background and learning about the environmental burdens arising from daily life.