Global Warming Flashcards
1
Q
Scientists have concluded that global warming is taking place and that it is caused at _____ partly by human activities.
A
least
2
Q
Natural events such as _______ _______ and ______ ____ may also be part of the cause of global warming. Like some human activities, they may increase the concentration of what in the atmosphere.
A
volcanic eruptions and forest fires. Greenhouse gases
3
Q
A worldwide increase is called global warming. Define it.
A
Human activities are generating more greenhouse gases, so many scientists have concluded that more heat is being trapped. This means that Earth’s surface temperature will continue to rise.