It is true to say that fossil fuels are still our main source of energy today, and as more countries develop their industries and their economies, the scale of their use continues to grow.
However, we are now well aware of the consequences of relying on this energy source for our natural environment. Global warming and the damage to the protective ozone layer are caused by carbon dioxide and other by-products of fossil fuels. So I certainly agree that these problems are global rather than national ones. They threaten our whole planet and no action by a single country could solve them.
Furthermore, these problems are urgent as nobody knows when our natural world will be so damaged that it will no longer be able to support us.
While some countries already use safer alternative energy sources, such as wind, water, or solar power, it seems that there has not been sufficient investment in developing the technology to make such alternatives viable for all. So it should definitely be a global priority to invest in such research and development.
Of course, there are other global priorities that we also need to address, such as poverty and diseases. But while it may be the case that these problems are just as important as the energy problem, there is a sense that time is ticking away for our planet and any solutions to the energy issue will take some time to achieve.
So in conclusion, I would agree that finding alternatives to fossil fuels is certainly the most pressing global priority, if not the most important one for our world today.