"Observation is the test of scientific truth. So far, observations of the earth's temperature has not revealed signs of a human-induced global warming."—George C. Marshall Institute, 1997

Which of the following statements best reflects and agrees with the quote?

A. Scientists disagreed on whether human activity had a significant impact on Earth's temperature.
B. Studies have proven that industrialization has had no measurable impact on the environment.
C. Recent laws were successful in limiting the long-term effects of industrialization on the Earth.
D. Researchers have not found evidence humans cause or control Earth's temperature changes.

Scientists have reached a strong consensus that human activities, specifically the emission of greenhouse gases, are the primary cause of the observed global warming since the industrial revolution. Multiple studies and independent methods, such as tree ring and coral reef analyses, support the evidence of human-induced climate change. The temperature increase and its impacts on the environment are well-documented and attributed to human activities.

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