Answer:
The best way to introduce a claim for a paper on the positive effects of solar thermal energy is to start by outlining the main points of the argument.
This should provide the reader with an overview of the benefits of this form of energy, such as its cost-efficiency, environmental sustainability, and its potential to reduce dependence on non-renewable sources of energy.
Additionally, a brief discussion of the current state of solar thermal energy should be included, such as its increasing prevalence in various parts of the world.
This introduction should be followed by the main claim of the paper, which should be supported with evidence throughout the paper.