How many % of the Earth’s surface is covered by water?
- 79%
- 71%
- 82%
- 60%
Which country has the biggest fresh-water reserve?
- Canada
- Ireland
- Hungary
- the USA
How many % of the fresh-water can be found under the surface?
- 63%
- 82%
- 98%
- 77%
How many % of the glaciers in the world had disappeared in the last century?
- 10%
- 50%
- 90%
- 91%
How many km had the Muir glacier lost from its lenght in 7 years?
- 2 km
- 5 km
- 8 km
- 10 km
A human produces 11kg carbon dioxide a day on average which goes into the atmosphere. How many kg of it is taken by the sea a day?
- 5 kg
- 4 kg
- 9 kg
- 1 kg
How many million children’s death (under age 5) is caused by polluted water?
- 20 million
- 5 million
- 30 million
- 15 million
How many km2 of the sea was covered by oil at the Exxon Valdez disaster?
- 15 455
- 16 899
- 10 233
- 98 246
And how much oil flowed into the sea in this affair?
- 25 million litres
- 38 million litres
- 42 million litres
- 50 million litres
How many million tons of nitrate comes to the ocean every year?
- 3
- 2,6
- 4,01
- 3,56
How much is the quantity of the industrial waste water per day?
- 1 million cubic metres
- 2,5 million cubic metres
- 2 million cubic metres
- 1,7 million cubic metres
Industry produces 2,5 million cubic metre sewage. How big part of it comes back to the nature without cleaning?
- quarter
- two-third
- more than 75%
- half
How many thousands of barrels oil came into the waters in the last decade?
- 600
- 700
- 300
- 999
Now the third of the world’s population lives in a water shortaged country. By 2025 with how many % will this number grow?
- 50
- 60
- 89
- 46
How many lead gets into the oceans in a year?
- 420 000 ton
- 112 000 ton
- 370 000 ton
- 250 000 ton
Which materials have a dominant role in the formation of the acid rains?
- aldehydes
- sulfur dioxide and carbon monoxide
- sulfur dioxide and carbon dioxide
- nitrogen oxides
Because of the water pollution living beings are significantly perished. 24 fish species lived in the Aral Sea. How many of them live still nowadays?
- 4
- 10
- 15
- 20
Which is the most polluted river in the world?
- Dadang Tri
- Reuters
- Ganges
- Citarum
How many factories are established on the bank of the most polluted river?
- 46
- 50
- 200
- 500