At this time the main resources of energy include the extraction of gas, oil and coal from the Earth. These are fossil fuels meaning that they are made from decomposed plants and animals from millions of years ago. These resources are finite (there's a limited amount) so humans have to look at different ways to make energy, for example renewable energy's .e.g. Wind or Solar. These release Greenhouse Gases such as CO2 and methane and can also release water vapour into the air. These trap heat as he atmosphere thicken and warms up the earth which can lead to disastrous consequences.