Many scientists think climate change is the greatest challenge facing humanity today.
opinion
Many visitors find the Eiffel Tower the most fascinating landmark in Paris.
opinion
It might be true that deforestation will completely destroy the Amazon within the next 50 years.
opinion
The Great Wall of China is over 13,000 miles long.
fact
Scientists think the Sahara Desert was once a lush, green landscape.
opinion
Many people believe that the Great Wall is one of the most impressive architectural achievements in history.
opinion
Mount Everest is the tallest mountain above sea level, standing at 8,848 meters.
fact
People speculate that renewable energy will solve the world’s energy problems.
opinion
Elephants are the largest land animals currently living on Earth.
fact
The human heart pumps blood through the body approximately 100,000 times a day.
fact
The Eiffel Tower was built in 1889 for the Paris Exposition.
fact
The Amazon rainforest produces about 20% of the world’s oxygen.
fact