As the population of Earth increases, it gets more difficult to feed all the people living here. Our natural resources are exhaustible, and we use them so intensely that little fossil fuels and fresh water may remain in a century or so. We have not taken many tangible steps in the protection of natural resources so far. However, we can do better to make sure that future generations will not stay without water or fuel.
Concerns about food security arise because hectares of lands are involved in raising crops for the livestock. Production of meat and dairy became more important than raising crops for human consumption, which provides an inefficient land use. In future, we shall rely more on sustainable agriculture. We also need to make sure that fresh water is accessible everywhere. Wise energy consumption is essential, but we also have to increase the share of the renewable energy in the grid.