Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

Context: So that people in developed nations maintain a good lifestyle and people in developing nations have the ability to improve their lifestyles, natural resources must be conserved and protected (Figure 1.1). People are researching ways to find renewable alternatives to non-renewable resources. Here is a checklist of ways to conserve resources: Buy less stuff (use items as long as you can, and ask yourself if you really need something new). Reduce excess packaging (drink tap water instead of water from plastic bottles). Recycle materials such as metal cans, old cell phones, and plastic bottles. Purchase products made from recycled materials. Reduce pollution so that resources are maintained. Prevent soil erosion. Plant new trees to replace those that are cut down. Drive cars less, take public transportation, bicycle, or walk. Conserve energy at home (turn out lights when they are not needed). Click image to the left or use the URL below. URL: Click image to the left or use the URL below. URL: 
 Question: which one of these can you not recycle
trees

Context: A personal journey into the heart of the Killing FieldsOne of the most harrowing and compelling personal documentaries of our time, ENEMIES OF THE PEOPLE exposes for the first time the truth about the Killing Fields and the Khmer Rouge who were behind Cambodias horrific genocide. More than simply an inquiry into Cambodias experience, however, ENEMIES OF THE PEOPLE is a profound meditation on the nature of good and evil, shedding light on the capacity of some people to do terrible things and for others to forgive them.Winner of a dozen top documentary festival awards, including a Special Jury Prize at Sundance and the Grand Jury Award at the Full Frame Documentary Festival, this is a riveting film that takes audiences as close to witnessing evil as they are ever likely to get. It is also a personal journey into the heart of darkness by journalist/filmmaker Thet Sambath, whose family was wiped out in the Killing Fields, but whose patience and discipline elicits unprecedented on-camera confessions from perpetrators at all levels of the Khmer Rouge hierarchy. This is investigative journalism of the highest order.In 1974, Thet Sambaths father became one of the nearly two million people who were murdered by the Khmer Rouge when he refused to give them his buffalo. Sambaths mother was forced to marry a Khmer Rouge militiaman and died in childbirth in 1976, while his eldest brother disappeared in 1977. Sambath himself escaped Cambodia at age 10 when the Khmer Rouge fell in 1979.Fast forward to 1998, and Sambath, now a journalist, got to know the children of some senior Khmer Rouge cadre and gradually earned their trust. Then, for a decade, he spent weekends visiting the home of the most senior surviving leader, Nuon Chea, aka Brother Number Two under Pol Pot. But he never used to say anything different from what he told Western journalists, says Sambath, I was low-ranking, I knew nothing, I am not a killer. Then one day he said to me Sambath, I trust you, you are the person I would like to tell my story to. Ask me what you want to know. For the next five years he told me the truth, as he saw it, including all the details of killing.Sambath also won the confidence of lower-level Khmer Rouge soldiers, now ordinary fathers and grandfathers, who demonstrated to him how they slit peoples throats. For these murderers, it was the first time they admitted what they had done. He taped their interactions and discussions about the killings, and together with British documentarian Rob Lemkin they created this landmark film.For Sambath, it has been an ongoing, lifelong personal journey to discover what was behind such horror; he neglected both his family and his own happiness in the search for truth with hope of reconciliation. ENEMIES OF THE PEOPLE is at once a cinematically beautiful, chillingly insightful, and deeply personal piece of documentary filmmaking. 
 Question: How many Cambodians died during the rule of Khmer Rouge?
nearly two million

Context: In a house with more than one kid, there are bound to be some problems. Brothers and sisters borrow stuff, and don't always return it in top condition. Younger kids sometimes feel the older kids get to do whatever they want. Older brothers and sisters think that the baby of the family gets more attention. These are typical problems found throughout the ages, everywhere in the world. When brothers and sisters don't get along well, it's called sibling rivalry. A sibling is a brother or sister and rivalry means competition. It's normal, but too much competition can make for an unhappy home life. A little competition isn't a bad thing. Sometimes it can keep you working hard--when you and your brother spend time shooting hoops. If he's good at it, it may make you want to improve, too. But some sibling rivalry involves arguments--when you think your brother is hogging the ball. People who love each other might argue sometimes, but too much fighting is unpleasant for everyone. Have you ever heard of the green-eyed monster called jealousy ? Sometimes brothers and sisters are jealous of one another. For instance, if your sister always does well at school, it may be frustrating for you, especially if your grades are lower. Although you are probably proud of your brothers and sisters, it's normal to be a little jealous, too. It may make you feel better to focus more on doing your own personal things, rather than comparing yourself with a brother or sister. All kids want attention from their parents, but sometimes you need to take turns. It you are feeling ignored or your brother or sister is always in the spotlight, talk to your mom or dad. If a parent knows you're feeling left out, he or she can figure out ways to help you feel better again. 
 Question: What does the author think of a little jealousy between brothers and sisters?

normal.