When you are in the middle of solving a task and the weather keeps you from making the deadline (thunderstorm knocked out the internet);the weather is called a

Barrier.

Explanation:

The weather is called a barrier because it stops you from completing your task within the given time. With this weather condition, you are unable to complete your task due to unavailability of internet which is required for your task. Weather such as thunderstorm can disrupt the internet service to a specific area because thunderstorm can destroy whatever comes in its way so if thunderstorm prevent you from doing your task complete in a given time so it is a barrier.

your best option is 5,000 kg

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.