Download presentation here
Living Things in their EnvironmentLiving Things in their Environment Summary1. DeforestationConsequences- soil erosion
- flooding
- loss of habitat
- loss of valuable species
- climatic changes
- upsets oxygen and carbon dioxide balance
2. Air pollutionCaused by- burning of fossil fuel
- exhaust fumes from motor vehicles
- burning of garbage
3. Water pollutionCaused by- discharge of untreated sewage
- discharge of inorganic waste
- excessive use of chemical fertilizers
- use of pesticides
Reasons for clearing forests/ deforestationTo provide:- land for cultivation, urban development, grazing
- timber for construction and making paper
- firewood
PollutionPollution is the process by which harmful substances are added to the environment- air pollution from: forest fires, volcanic eruptions, biological decomposition, human activities
- water pollution from: human activities
ConservationConservation is necessary for the protection of plant and animal species to maintain a stable and balanced ecosystemConservation measures:- reducing or eliminating pollution through education and legislation
- controlling growth of human population
- conserving natural resources. Recycling important for conservation which conserves non-renewable natural resources but also
- reduced the problem of waste disposal and environmental pollution
- is economical as it saves energy and money
- recovering wildlife, especially those species that are in danger of extinction
|
|