Теория:

To speak about ecological problems, you need the appropriate vocabulary.
  
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Ecology - the relationship between living things and the environment, or the scientific study of this;
 
Concern - to involve someone or be important to them;
 
Air pollution - damage caused to air by harmful substances or waste;
 
Water pollution -  damage caused to water by harmful substances or waste;
 
Natural resources - things such as ​minerals, ​forests, ​coal, etc. that ​exist in a ​place and can be used by ​people;
 
Harmful - causing or likely to cause harm;
 
Technological - relating to, or involving technology;

Chemical - relating to chemistry or chemicals;
 
Litter - pieces of paper and other waste that are left in public places;
 
Plastic - a light, artificial substance that can be made into different shapes when it is soft and is used in a lot of different ways;
 
Glass - a hard, transparent substance that objects such as windows and bottles are made of
acid rain;
 
Species - a group of plants or animals which share similar characteristics;
 
Recycle - to put used paper, glass, plastic, etc through a process so that it can be used again.
 
Examples:
 
Environmental issues concern us all.
  
Some ​natural ​resources, such as ​natural ​gas and ​fossil ​fuel, cannot be ​replaced.
  
Many toys are made of plastic.
  
We recycle all our newspapers and bottles.
Источники:
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