Matching Pairs Protect the wild lifeOnline version Do the green thing by Elina Ihnatsiuk 1 Hikers and campers often become infected by drinking water from CONTAMINATED streams. 2 Thousands of lives will be AT STAKE if emergency aid does not arrive in the city soon. 3 The organization has been the subject of SEVERE criticism for the way it treated its staff. 4 Environmental problems relating to the factory have yet to be ADDRESSED. 5 Television has such an IMPACT on our kids. 6 Recycling helps CONSERVE natural and often limited resources. 7 The police are looking for more effective ways to COMBAT drugs gangs in the city. start trying to solve the problem very bad or very serious the effect or influence that an event, situation etc has on someone or something to protect something and prevent it from changing or being damaged likely to be lost or damaged if something fails to make a place or substance dirty or harmful by putting something such as chemicals or poison in it to try to stop something bad from happening or getting worse – used especially in news reports