Do you know what renewable energies, fossil fuels and greenhouse gases are?
A denialist is a person who denies the existence of climate change. Denialists believe that the global temperature increase is due to natural causes. However, most of the international scientific community affirms that climate change is a reality and that humans are responsible.
2Greenhouse gases (GHG)
Greenhouse gases (GHGs) absorb solar energy that reaches our planet and retain it in the atmosphere, making the planet a warm place. These gases exist naturally, but the problem is that some of our activities (production in factories, generating energy, travelling by car or plane) emit even more of these gases into the atmosphere, which causes the temperature of the planet to increase too much.
Fossil fuels are materials that were formed millions of years ago from the remains of plants and animals. These organic remains were deposited in seas, lakes and other bodies of water and, after thousands and thousands of years of decomposition, turned into oil, coal or natural gas. Fossil fuels pollute a lot and are non-renewable sources of energy, which means that one day they will end.
Renewable energies such as hydraulic energy (produced with water), wind (with wind) or solar (with sunlight) are unlimited and help reduce greenhouse gas (GHG) emissions. The name comes from the fact that, unlike fossil fuels, they are considered inexhaustible and can be regenerated by natural means.
When calculating the greenhouse gas (GHG) emissions produced by an activity, there is often a difference between direct and indirect emissions. Direct emissions are those directly produced by a person or company, for example: by driving a vehicle or using machinery that consumes fuel to operate.
On the other hand, indirect emissions are those that we do not produce ourselves, but are the GHGs emitted in order to manufacture the products or energy that we consume. For example: buying a sweater does not pollute, but if the sweater was brought by plane from Australia, the indirect emissions would be very high.