Scientists therefore agree that it is time (25) __to stop__ the spread of global warming emissions (26) __undoubtelly__ produce natural global warming. Yet, the major responsibility for turning global warming into a potential dangerous activity falls on humans. Ever since the Industrial Revolution, the burning of fossil facts to power car and generate electricity (27) __has led__ to the ever increasing emission of toxic carbon monoxide and carbon dioxide into the atmosphere. These gases trap beat and lead to the formation of the so - called green house effect, which in turn (28) __rises__ global temperatures. Only decisive government measures will curb down and limit the growth of this destructive effect on our planet.

Scientists therefore agree that it is time (25)____B__ the spread of global warming before it is too late. Solar radiation and volcanic emissions (26)___D__ produce natural global warming. Yet, the major responsibility for turning global warming into a potential dangerous activity falls on humans. Ever since the Industrial Revolution, the burning of fossil fuels to power cars and generate electricity (27)__A__ to the ever-increasing emission of toxic carbon monoxide and carbon dioxide into the atmosphere. These gases trap heat and lead to the formation of the so-called greenhouse effect, which in turn (28) __A__global temperatures. Only decisive government measures will curb down and limit the growth of this destructive effect on our planet.