Renewable resources can be replaced by natural processes as quickly as humans use them. Examples include sunlight and wind.
Nonrenewable resources exist in fixed amounts. They can be used up. Examples include fossil fuels such as coal.
Greenhouse gas emissions
Perhaps the most well-known impact of using non-renewable energy sources is the emission of greenhouse gases, in particular carbon dioxide and methane, which contribute to climate change [1]. Different types of non-renewable energy fuels emit different levels of greenhouse gases.
