Human Population and Environmental Impact

Front

Key concept discussed in lesson 1

Back

How humans can minimize their impact on the land.

Front

Graph showing world population growth from 1950 to 2050

Back

The graph demonstrates the increase in world population over time and projections for future growth.

Front

Deforestation affects air quality by reducing the number of trees that remove carbon dioxide through photosynthesis.

Back

Fewer trees mean less carbon dioxide is removed from the atmosphere, worsening air quality.

Front

Deforestation in tropical rainforests threatens 50% of all species on Earth.

Back

Half of Earth's species are at risk due to deforestation in tropical rainforests.

Front

Land usage for agriculture increases as the human population grows, leading to environmental consequences.

Back

Farming to meet population needs causes issues like pollution, reduced soil quality, and loss of space for other activities.

Front

Deforestation destroys habitats, leading to species extinction and loss of biodiversity.

Back

Habitat destruction from deforestation causes species extinction and reduces biodiversity.

Front

Agriculture's environmental impacts include pollution from pesticides and reduced soil quality.

Back

Farming contributes to environmental issues like pesticide pollution and soil degradation.

Front

Soil Quality

Back

When plants are removed for farming, soil is exposed and can be eroded by rain and wind. This can lead to desertification, making the land unsuitable for growing food.

Front

Urbanization

Back

The development of land for houses and buildings near cities is called urbanization. It reduces farmland and impacts groundwater supplies.

Front

Impact of Urbanization

Back

Urban development prevents water from soaking into the soil, increasing runoff into streams and raising the risk of flooding. It also destroys habitats and reduces groundwater recharge.