to be affected - To experience a change or influence as a result of something else happening., global birth rate - The number of births per year worldwide., to predict - To say what will happen in the future based on evidence or knowledge., source of energy - Something that provides power or fuel for machines, vehicles, or other devices., solar power - Energy from the sun that is converted into electricity or used to heat water., climate change - Changes in the Earth's weather patterns over a long period of time, often caused by human activity., to run out of - To use up all of something so that there is nothing left., dramatically - In a sudden and unexpected way that causes surprise or excitement., earthquake - A sudden shaking of the ground caused by movements beneath the Earth's surface., to increase - To become larger in size, amount, or degree., genes - Units of DNA that carry genetic information and determine inherited characteristics., research - A careful study or investigation done to discover new facts or information about a subject., steadily - Happening gradually or slowly but continuously over time., to cause - To make something happen, especially something bad., to explore - To travel to a new place or examine something carefully in order to learn more about it., to invest - To put money, time, or effort into something with the hope of making a profit or achieving a goal., cure - A medicine or treatment that makes someone who is sick healthy again., be at risk of - To be in danger of something bad happening to you.,

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