In Chile the generations have been able to see how the weather has changed, and a lot of studies say that in 2030 if we don´t do anything we will live in a country hotter, less rainy, more prone to storms and with more cloudy days.
The possible reasons about de climate changes in Chile are the CO2 and the pollution in all the world. The Global Warming is more noticed in countries with rainy weather or countries with cold weather. In Chile we have this types of weather and the people know that in old times, for example the winter was different than it is now.
In contrast of the people that think the changes of weather are the result of the human pollution; In all the history of the Earth has always suffered weather changes like cycles. All the proccesses that occur in th Climatic System, on the planet, have their almost exclusive source of energy in the sun and the Global Waming could be another necessary cycle of the Earth life.
One thing that the human is doing now is helping the cycle with their pollution, but sooner or later, this climate change had to happen in agreement to her nature. The Earth doesn´t occupy a fixed position in relation to the sun; the trajectory is elliptical, whose eccentricity changes over time with a periodicity of 100 000 years. Therefore the distance of the Earth and the Sun are not going to be the same year after year.
After all, the climate change will exist forever, but we can delay them reducing CO2, and the pollution in general.