Geography [2 Mark Question Answer]

According to Food and Agricultural Organisation (FAO) “Organic agriculture is a unique production management system which promotes and enhances agro-ecosystem health, including biodiversity, biological cycles, and soil biological activity, and this is accomplished by using on-farm agronomic, biological and mechanical methods in exclusion of all synthetic off-farm inputs”.

Fossil fuels refer to buried, combustible deposits of organic materials, formed from decayed plants and animals that have been converted to crude oil, coal, and natural gas by exposure to heat and pressure in the earth’s crust over hundreds of millions of years.

Radioactive waste should be stored deep into the ground, where gradual decay may take place. High activity solid wastes could be packed in shielded containers, while low-level liquid and gaseous wastes may be diluted before disposal for the best possible safety.

Radioactive particles should not be inhaled by using air filters, using an exhaust system is another method, wearing protective clothing prohibiting smoking are essential. The leakage of radioactive elements from nuclear reactors and plants should be checked regularly.

Non-point sources of pollution are the outside sources which affect a large area, e.g. run-off from agricultural fields and deforested areas. Run-off of manure should be diverted to the dry fields, there should be separate drainage for sewage to divert it with rainwater. Natural manure should be used and pest management system should be established for pest control to reduce the use of pesticides.

It is a device which removes unwanted chemicals from smoke after combustion takes place. The negatively charged dust particles are drawn towards the positively charged particle's collector surface and, by knocking the plates, particles fall into a hopper tray for disposal.