Read the paragraphs of an essay and choose the correct topic sentences and linkers to fill in the gaps

1. However, installing solar power in all homes would not be without its disadvantages.
2. I am totally against installing solar power in all homes.
3. On the one hand, there are some clear advantages to installing solar power in all homes.
4. In my opinion, all homes should definitely have solar panels installed.

[1|2|3|4][Firstly|Therefore], using the sun's energy more is good for our planet. [Moreover|For example], solar energy is a very clean form of energy that does not pollute. [Secondly|As a result], unlike non-renewable energy sources like oil and gas, solar energy will never run out. [Therefore|However], the people who use it depend less on oil, which can be very expensive and sometimes even in short supply.

[1|2|3|4][On the other hand|To start with], the amount of energy that solar panels create varies. [For instance|Nonetheless], the sun is weaker in the winter, on cloudy days and in colder countries. [In addition|However], solar panels can be expensive to install. [Finally|For this reason], some households may not be able to afford to install them.