Whether we can anticipate and prevent everything that can harm us is a complex question with no easy answer. On the one hand, there are many risks that we can identify and take steps to mitigate. For example, we can build levees to protect against floods, install smoke detectors to prevent fires, and develop vaccines to protect against diseases.

On the other hand, there are also many risks that are difficult or impossible to anticipate. For example, we cannot predict when a natural disaster will strike or when a new virus will emerge. Additionally, even if we can anticipate a risk, it may not be possible to prevent it. For example, we cannot prevent all car accidents, even if we take steps to drive safely.

The cost of anticipating and preventing harm can also be high. For example, the levees that protect New Orleans from flooding cost billions of dollars to build and maintain. Additionally, the development of new vaccines can be expensive and time-consuming.

Ultimately, the decision of whether or not to anticipate and prevent harm is a balancing act. We need to weigh the costs and benefits of each risk and decide what level of risk we are willing to accept.

In the case of global warming, there is a growing consensus among scientists that it is a real and serious threat. The Intergovernmental Panel on Climate Change (IPCC), the leading international body for the assessment of climate change, has concluded that it is extremely likely that human activities caused more than half of the observed increase in global mean surface temperature from 1951 to 2010.

The IPCC has also concluded that global warming is likely to have a significant impact on human health, ecosystems, and the economy. For example, it is projected that global warming could lead to more extreme weather events, such as heat waves, droughts, and floods. These events could cause widespread damage and displacement, and could also lead to increased deaths and illnesses.

In light of the risks posed by global warming, many countries have adopted policies to reduce greenhouse gas emissions. These policies include investing in renewable energy, improving energy efficiency, and putting a price on carbon.

However, there is still much that we do not know about global warming, and there is no guarantee that our efforts to mitigate it will be successful. It is therefore important to continue to invest in research and development, and to be prepared for the potential impacts of climate change.

The questions you raise are indeed important and worthy of keeping in mind. As we face an increasingly uncertain future, it is essential that we think carefully about how to anticipate and prevent harm. We need to be creative and innovative in our approach, and we need to be willing to make difficult choices. The future of our planet depends on it.