Scientists first introduced the idea that human activity could _____ climate change in the 19th century.
affect
effect
occur
Other scientists thought that pollution could also have a cooling _____.
affect
effect
calculation
In the 1950s and 1960s, scientists started presenting convincing calculations of the warming ______.
affect
sync
effect
Many changes will _____ as a result of global warming.
occur
increase
convince
The IPCC (Intergovernmental Panel on Climate Change) ______ that 20-30 percent of plant and animal species will be at risk of extinction if the temperatures continue to rise.
argues
estimates
affects
However, ________, like bees, respond to the change in air temperature.
pollinators
species
effects
In many regions, global warming is ________ the seasons and there is no longer a clear difference between the four seasons.
influencing
increasing
convincing
In the last 50 years, the temperature ________ have brought about more heat waves, droughts, forest fires, earthquakes, as well as more intense hurricanes.
increases
estimates
effects
These changes are also affecting animals and the lifecycles of all living ______.
species
creatures
pollinators
This is causing more ______ floods, tidal waves (tsunamis) and large tropical cyclones.
present
influencing
frequent
Our actions decide to what ______ global warming will change life on Earth.
concern
drought
degree
Between 1870 and 2000, the sea level rose by 1.7 millimetres per year on _______, 221 millimetres in all.
average
effect
concern
Plants need to be ________ but the bees need to keep their queen, themselves and the eggs warm.
convinced
pollinated
estimated
