pregnancy failure is diagnosed when a CRL measurements is ………….. without cardiac function.

 On some continents most wood is used for fuel, but on other continents most wood is used for lumber.

Most high-level radioactive waste is currently stored on-site near the nuclear plant where it was used.

Combustion of natural gas increases atmospheric levels of greenhouse gases.  

 Silt particles are smaller than clay particles.

 Would you be for or against the construction of a wind farm on the shores of Lake Erie?  List two factors affecting your decision.

 The construction of hydroelectric power plants has little effect on wildlife.

 Explain the process of hydraulic fracturing (fracking), then describe its major environmental impacts.

 Ecologically speaking, why is it better for humans to be vegetarians than to be carnivores?

Pollution from aluminum can production destroys atmospheric ozone.