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In this online Flash game, learners will explore a coral reef using an underwater remotely operated vehicle (ROV).

In this activity, learners explore the human influences on the carbon cycle and examine how fossil fuels release carbon.

This online simulation game explores the different consequences of water levels on the Columbia River in the Pacific Northwest.

In this activity about global climate change, learners will conduct an experiment and collect data to compare the amount of carbon dioxide (CO2) in four different sources of gases.