Environmental problems
Sustainable development
100

A gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide and other pollutants.

What’s global warming / What is climate change ?

100

The action or process of converting waste into reusable material.

What is recycling ?

200

The result of cutting down trees without even thinking of replacing them.

What’s deforestation ?

200

Trams, Trains, Bikes, Walking, Car sharing, etc.

What are green/sustainable modes of transportation?

300

Unwanted or unusable material, substances.

What’s waste ?

300

Energy that is produced using the sun, wind, etc., or from crops, rather than using fuels such as oil or coal.

What is renewable energy?

400

The sum of all emissions of CO2 (carbon dioxide), which were induced by our activities in a given time frame. Usually calculated for the time period of a year.

What’s a carbon footprint ?

400

Designed to absorb the sun's rays as a source of energy for generating electricity or heating.

What are solar panels ?

500

A situation in which an area is covered with water, especially from rain.

What is flooding? / What is a flood?

500

A tall structure with blades that are blown round by the wind and produce power to make electricity.

What is a wind turbine?

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