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It appears that the text you provided is in Russian and contains a mix of mathematical and general knowledge questions. Let's break down each question and provide answers accordingly.<br /><br />1. **Question:** What is the difference between the years 1970 and 2019 in terms of population growth?<br /> - **Answer:** The population growth from 1970 to 2019 can be calculated by subtracting the population of 1970 from the population of 2019. For example, if the population in 1970 was 1 billion and in 2019 it was 7.7 billion, the growth would be 6.7 billion.<br /><br />2. **Question:** What are the main factors that affect the population growth rate?<br /> - **Answer:** The main factors include birth rates, death rates, immigration, and emigration. Other factors such as economic conditions, healthcare availability, and government policies also play significant roles.<br /><br />3. **Question:** How many times greater is the population of 2019 compared to 1970?<br /> - **Answer:** If the population in 1970 was 1 billion and in 2019 it was 7.7 billion, the population in 2019 is 7.7 times greater than in 1970.<br /><br />4. **Question:** What are the main sources of energy in the world today?<br /> - **Answer:** The main sources of energy today are fossil fuels (oil, coal, natural gas), nuclear energy, and renewable energy sources (solar, wind, hydroelectric).<br /><br />5. **Question:** What was the average global temperature in 2019 compared to 1970?<br /> - **Answer:** According to data from NASA and other climate research organizations, the average global temperature in 2019 was approximately 1.1°C higher than the 1970 average. This increase is largely due to human-induced climate change.<br /><br />If you have any specific calculations or further details you need help with, please let me know!