We are looking at alternate sources of energy because the fossil fuels and nuclear fuels on the earth are limited which may not last for long and the undesirable effects of pollution, both from the burning of fossil fuels and from the radioactive nuclear wastes of nuclear power plants are creating tRead more
We are looking at alternate sources of energy because the fossil fuels and nuclear fuels on the earth are limited which may not last for long and the undesirable effects of pollution, both from the burning of fossil fuels and from the radioactive nuclear wastes of nuclear power plants are creating threat to our environment.
Disadvantages of fossil fuels are: (i) The burning of fossil fuels produces large amount of carbon dioxide that causes increased greenhouse effect. (ii) The burning of fossil fuels (such as coal) produces smoke which pollutes the air. (iii) The burning of fossil fuels produces acidic gases such as sRead more
Disadvantages of fossil fuels are:
(i) The burning of fossil fuels produces large amount of carbon dioxide that causes increased greenhouse effect.
(ii) The burning of fossil fuels (such as coal) produces smoke which pollutes the air.
(iii) The burning of fossil fuels produces acidic gases such as sulphur dioxide and nitrogen oxide. These acidic gases cause acid rain that affects our water and soil resources.
(iv) Fossil fuels cannot be replenished in short time because it takes millions of years to form them.
(i) Biodegradable substances are decomposed by the action of microorganisms and decomposed materials are recycled through geo-chemical cycle. (ii) These substances keep the environment clean.
(i) Biodegradable substances are decomposed by the action of microorganisms and decomposed materials are recycled through geo-chemical cycle.
(ii) These substances keep the environment clean.
The main reason of a substance being biodegradable is being organic that can be used up by scavengers of environment. On the other hand some substances are non biodegradable because they are synthetic and cannot be decomposed by the microorganism.
The main reason of a substance being biodegradable is being organic that can be used up by scavengers of environment. On the other hand some substances are non biodegradable because they are synthetic and cannot be decomposed by the microorganism.
Why are we looking at alternate sources of energy?
We are looking at alternate sources of energy because the fossil fuels and nuclear fuels on the earth are limited which may not last for long and the undesirable effects of pollution, both from the burning of fossil fuels and from the radioactive nuclear wastes of nuclear power plants are creating tRead more
We are looking at alternate sources of energy because the fossil fuels and nuclear fuels on the earth are limited which may not last for long and the undesirable effects of pollution, both from the burning of fossil fuels and from the radioactive nuclear wastes of nuclear power plants are creating threat to our environment.
See lessWhat are the disadvantages of fossil fuels?
Disadvantages of fossil fuels are: (i) The burning of fossil fuels produces large amount of carbon dioxide that causes increased greenhouse effect. (ii) The burning of fossil fuels (such as coal) produces smoke which pollutes the air. (iii) The burning of fossil fuels produces acidic gases such as sRead more
Disadvantages of fossil fuels are:
See less(i) The burning of fossil fuels produces large amount of carbon dioxide that causes increased greenhouse effect.
(ii) The burning of fossil fuels (such as coal) produces smoke which pollutes the air.
(iii) The burning of fossil fuels produces acidic gases such as sulphur dioxide and nitrogen oxide. These acidic gases cause acid rain that affects our water and soil resources.
(iv) Fossil fuels cannot be replenished in short time because it takes millions of years to form them.
Give any two ways in which non-biodegradable substances would affect the environment.
(i) They cause air, water and soil pollution. (ii) They may cause bio-magnification in the food chain and end up in humans.
(i) They cause air, water and soil pollution.
See less(ii) They may cause bio-magnification in the food chain and end up in humans.
Give any two ways in which biodegradable substances would affect the environment.
(i) Biodegradable substances are decomposed by the action of microorganisms and decomposed materials are recycled through geo-chemical cycle. (ii) These substances keep the environment clean.
(i) Biodegradable substances are decomposed by the action of microorganisms and decomposed materials are recycled through geo-chemical cycle.
See less(ii) These substances keep the environment clean.
Why are some substances biodegradable and some non-biodegradable?
The main reason of a substance being biodegradable is being organic that can be used up by scavengers of environment. On the other hand some substances are non biodegradable because they are synthetic and cannot be decomposed by the microorganism.
The main reason of a substance being biodegradable is being organic that can be used up by scavengers of environment. On the other hand some substances are non biodegradable because they are synthetic and cannot be decomposed by the microorganism.
See less