In his book Clean Energy Crisis, Donn Dears explains why it is impossible for society to reach net zero carbon emissions. Dears explains why it would be a bad idea to attempt to go net zero if this was a realistic possibility. Fossil fuels are energy dense, having relatively little impact on the land and environment. Wind and solar require far more land, leaving a massive environmental "footprint." Not only are the so-called green energy replacements for fossil fuels not green, but they are expensive and unreliable. As wind and solar power is added to the grid, lives are placed at risks from outages while jobs are lost due to unreliable energy supplies.