Economics is the study of the choices people make in an effort to satisfy their needs and wants.
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Explanation:

Economics is the study or branch of the people individually or collectively satisfy their own needs depends on their own choices. Economics explains the how goods and services as inputs processed, transported and distributed to the end consumers or customers. Economics classified in to two types such as Micro economics and Macro economics. Micro economics deals with the sector oriented or product oriented then specific matter wise analysed. Macro economics deals with the country oriented such as National income, GDP, poverty and unemployment of country and so on.

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.