Since he soon learned his love for Vietnam, he has been making ..................... travels to the country from 1978.

Ontarians can now get a free ..................... testing kit for at-home use.

The scene was completely ..................... from the movie due to its violence

..................... is the action of surface processes that removes soil, rock, or dissolved material from one location on the Earth's crust.

Ocean ..................... is a key regulator of climate by storing and transporting heat, carbon, nutrients and freshwater all around the world.

..................... dams can reduce river flows, raise water temperature, degrade water quality and cause sediment to build up.

Surface ..................... is the flow of water occurring on the ground surface when excess water can no longer quickly enter the soil below.

Vietnam soldiers fought in ..................... of their country.

The loss of various species has raised the concern of environmental ......................