A huge part of that is the human emission of greenhouse gases. [MORE FORECASTING CHANGE: Billion-dollar disasters increasing in US | Using wind and solar energy to reach net zero | 2020 ties for hottest year on record]AdGreenhouse gas sourcesThe only problem with electric cars is how we create the electricity. In the future, we will we be using more renewable sources, such as solar, wind and hydroelectric to create the electricity instead of sources like coal. In coming months, we will focus more on these ideas in our Forecasting Change series. Temperature & carbon dioxideThe CO2 parts per million (PPM) are now higher than they have ever been in the past 800,000 years.