1. Environmental problems

2. Started being more serious since Industrial revolution
They still do not get enough attention
Large array of subjects and things
Many people still believe they are just myths

3. Ecological catastrophes
Two kinds: 1) Caused by human
2) Caused by nature
Unfortunately very common
Most of them can be predicted and thus limit or erase damages

4. Caused by human
At the beginning of almost every disaster is just normal human mistake
There have been awful lot of those events throughout human history
Most common are oil disasters (oil tankers accidents, oil leaks or explosions of oil rigs)
Though oil disasters are serious problem, nuclear ones are even greater threat
Thankfully only two nuclear disasters so far are Fukushima and Chernobyl

5. Caused by nature Even more common than those caused by human
Many believe these are examples of Natures' self- defence
The most common are floods (even in Czech Republic on almost yearly basis)
Disasters caused by wind: hurricanes, tornados, dust storms(Dust bowl), etc.
Disasters caused by volcanic or seismic activities: earthquakes, Tsunami waves(Japan, Haiti)), exploding volcanos

6. Invasion species
Invasion specie is specie of animal taken from its natural habitat and planted to ecosystem where it does not have any natural enemy. This causes its mass spread and total natural misbalance of the region.
There are many examples of this in history
Rabbits in Australia
Bolševník in Czech Republic
Asian Hornet in France

7. Pollution
Another problem caused exclusively by human and its technology
Just as serious as Ecological disaster, but much more subtle
Air Pollution: Smog (caused by high concentration traffic and heavy industry), Acid rains( sulphur getting into air is transforming into sulphur dioxide and rains back onto surface)
Water pollution: human waste (sewers draining into oceans), oil disasters
Soil pollution: mineral fertilizers (results in salty soil), pesticides (various poisons gets piles up in soil)

8. Global warming
Global warming is a result of CO2 in Earth‘s atmosphere.
This causes so called „Greenhouse effect“
Global warming have most effect on poles where the average temperature has risen almost 3 degrees of Celsius over past ten years.
Another issue is warming of the oceans, which has already caused many temperature sensitive species to go extinct.
So far the humanity does not know how to stop the Earth from further warming itself without drastic limitations to all industry and our life level.