Which
invention did the internal combustion engine make possible?

Some european explorers sailed west looking for the passage to india

Which sentences describes a cycle of dependency? a. aid harms the local economy creating the need for more aid.b. aid improves infrastructure and creates more wealth and more good infrastructure.c. aid programs become more reliable over time so people can depend on them.d. no answer is correct

What types of government incentives might encourage use of alternative energy sources? would their widespread use affect our economic and social environment?