For decades, politicians and business leaders have told us that today’s challenge is growing the economy, and that environmental protection can be left to future generations. Amy Larkin, in her book “Environmental Debt: The Hidden Costs of a Changing Global Economy,” says that in the wake of billions of dollars in costs associated with Hurricane Sandy, wildfires across the West, and groundwater contamination from drilling, it’s clear that yesterday’s carefree attitude about the environment has morphed into a fiscal crisis of epic proportions. She argues that the costs of global warming, extreme weather, pollution and other forms of “environmental debt” are wreaking havoc on the economy.