There are 4 _______ ______ in the solar system. (planety skaliste)

The ___ ____ on the surface of the Earth averages 101.325 kPa/kJ (ciśnienie atmosferyczne)

______ ______ are causing climate change. (gazy cieplarniane)

Paper could also be easily recycled and would considerably lift the ____ ____ burden. (gospodarka odpadami)

Electric energy can be generated in ____ ____. (elektrownia)

Over the past 250 years, _____ ______ levels have increased by 2,5%. (dwutlenek węgla)

Too little CO2 and we would _____, too much and we would "fry". (zamarzniemy)

_____ _____ come form natural sources and human activity. (gazy cieplarniane)