Migration has a big impact on national security, especially when it comes to people moving because of climate problems. This often makes challenges worse and forces countries to come up with new plans. According to the International Organization for Migration (IOM), by 2050, climate change could force more than 200 million people to leave their homes worldwide. This large number of climate refugees can put a lot of pressure on resources, social services, and infrastructure in the countries that take them in.

Main Impacts on National Security Policies:

1. Lack of Resources:

   • Many people move because they don’t have enough resources due to severe weather like droughts and floods. For instance, the World Bank estimates that South Asia might face an extra $37 billion a year in conflicts related to climate migration by 2030.

2. Tensions Between Countries:

   • When more people move, it can create tensions between countries, especially near borders. In 2015, the European Union saw over 1 million migrants come in, causing them to change their border security policies and discuss new asylum rules.

3. Health and Safety Issues:

   • People who migrate may be at a higher risk for health problems, which can affect national security. Many displaced people don’t have good access to healthcare, making it easier for diseases to spread. According to the World Health Organization (WHO), displaced people are 3.5 times more likely to face health issues than local residents.

4. Changes in Military Planning:

   • Countries are beginning to include climate change in their military plans. The U.S. Department of Defense sees climate change as a "threat multiplier," which means it can create more problems for stability and can lead to fights over resources.

In conclusion, migration caused by climate change makes it important for countries to rethink their national security plans. There is a strong need for flexible governance and teamwork between countries to handle the challenges of people being displaced by climate problems.