Giúp mình với ạ!!!!!!!!!!!

1. 

Global warming is a critical challenge facing our planet, and multiple factors contribute to this climate change phenomenon. One of the primary causes of global warming is carbon dioxide emissions. This pollution originates from the burning of fossil fuels in power plants, electricity production, and burning coal. The emissions from transportation, such as burning gasoline in cars and motorbikes, also release high levels of carbon dioxide. Methane emissions also play an important role in global warming and stem from agriculture and animal waste. Rice paddies and livestock production are examples of agricultural practices that emit a significant amount of methane. The buildup of these greenhouse gases traps heat in the atmosphere, which leads to an increase in global temperatures and a range of negative effects on our planet. It is essential to limit and control these emissions to mitigate the impact of global warming on our.

2. 

One cultural site that I believe my class would love to explore is the ancient city of Machu Picchu in Peru. Machu Picchu is a UNESCO World Heritage Site and one of the Seven Wonders of the World. Built during the Inca Empire, Machu Picchu is located on a mountainside and features impressive stone structures and terraces. Visiting the site, you can explore various ruins and learn about the history and culture of the Inca civilization. The site also offers breathtaking panoramic views of the surrounding mountains and valleys. For adventure seekers, the location provides hiking opportunities, such as the famed Inca Trail leading to Machu Picchu. Additionally, visitors can immerse themselves in the local culture and try traditional Peruvian cuisine in the nearby town of Cusco. Overall, Machu Picchu offers a unique and enriching experience for those interested in history, culture, the outdoors, and breathtaking.