Planetary defense: How can the Earth be protected from SCARY asteroid strikes?

tech.hindustantimes.com:

It is undeniable that the potential impact of an asteroid strike ranks among the most significant natural hazards we face. Similar to the event that caused the extinction of the dinosaurs 65 million years ago, a single asteroid collision has the capability to annihilate all life on Earth. NASA acknowledges this risk and therefore carried out its Double Asteroid Redirection Test (DART) in 2022. But that is just one part of a huge network different space agencies are either working on or have built up to protect us from any incoming space rocks.

But before getting into planetary defense, we must understand the threat of asteroids. The Earth is surrounded by asteroids, the majority of which come from the asteroid belt situated between Mars and Jupiter. As per latest data, NASA tracks about 26000 near-Earth objects (NEOs) which can pose a threat to our planet.

However, not all asteroids can destroy life on this planet. NASA states that any asteroid larger than 1 kilometer in size can cause a global catastrophe for the Earth. This means, an asteroid this size can not only cause massive impact damage, but also change the climate severely to cause another ice age to kill the majority of life.

In an effort to identify as many asteroids and comets as feasible, NASA has deployed large telescopes that can survey the skies on a nightly basis. NASA Center for Near Earth Objects Studies (CNEOS) under its Jet Propulsion Laboratory (JPL) handles data coming from all the telescopes by NASA. Similarly, European Space Agency (ESA), JAXA (Japanese space agency) and other institutions worldwide also have deployed either space telescopes or ground-based observatories to look for such asteroids.

But tracking is not enough. What happens when we see