The ancient Athenians developed the first form of democracy, called:

Direct democracy

Explanation:

In Athens only citizens were able to vote. Certain layers of society were not allowed to vote, as they were not  regarded citizens.

Women, children and slaves were therefore not allowed to vote.

In Athens they had 500 representatives that were part of government for a whole year.

Additionally, citizens could vote on the news laws that were to be introduced.

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.