Human Activities that Endangered an Ecosystem

9.1 Impact of human activities on the ecosystemDeforestion

1. Deforestation is the rapid woodland destruction or the removal of trees from forest for agriculture or development.

2. The importance of forest include: Habitat of flora and fauna. Contain species that provide food and medicine. Regulate climate. Act as carbon sink, regulate the amount of carbon dioxide and oxygen

through photosynthesis. Water catchment area.3. Deforestation causes: Soil erosion Flash flood Landslide Loss of biodiversity

Global warming

Greenhouse effect

Climatic changes

F arming 1. Excessive use of land for farm leads to infertile land.2. Intensive farming uses excessive inorganic fertilizers leads to

eutrophication.

Burning of fossil fuels1. Burning fossil fuels releases carbon dioxide into the atmosphere.2. Large amount of carbon dioxide will causes greenhouse effect and global warming.3. Burning fossil fuels and open burning also cause air pollution.

Industrialisation

Human Activities that Endanger the Ecosystem

Deforestation

Farming Burning of fossil fuels Industrialisation

Soil erosionLandslidesFlash floodsLoss of biodiversityGlobal warmingGreenhouse effectClimatic changes

EutrophicationPollution

Greenhouse effectGlobal warmingPollution

Pollution

1. Industrial plants discharge industrial wastes that are toxic.2. This may causes water pollution and thermal pollution.3. Toxic gases released by industries contribute to air pollution.

Deforestation and landscape Soil erosion and flash flood

Heavy air pollution caused by industrialization