Is climate change real?
Yes of course. Climate change s the norm. In fact trying to stop climate change by contoling the levels of a single substance like CO2 is insane.
Good thing no one is claiming to be able to do that, then. Controlling CO
2 is usually argued to try to prevent an accelarated global climate change.
If real, is it significantly caused by human activity?
Debatable.
It is debatable, and therefore has been debated extensively and for a fairly long time. Apperently most climatologists now agree that other possible causes have not contributed as much to the present warming trend.
If real, what is its current trend?
Debatable
The current trend seems to be: "warming"
If real, are its outcomes necissarily bad (for mankind in particular, or the planet in general)
Debatable, global warming could lead to increased precipitation.
Whether something is "bad" is not something that can be answered by science, because it is a value judgement. Depending on the things you value, present trends may be "good" or "bad". Since different people value different things, it is both good and bad at the same time.
If you value new shorter, safer shipping lanes in the artic, it's good.
If you value the preservation of tropical coral reefs, it is very bad.
If you hope tropical coral reefs will form elsewhere, it may be good.
If you value the preservation of natural habitats on land, it is not so good, but certainly not as bad as building roads or growing food crops everywhere.
If you value Norwegian vineyards, it is good.
If you value Bangladeshis staying in their own country and not seek refuge elsewhere, it is bad.
If you value the Dutch exporting their flood protection technology, it is good.
If you value Tuvalu, it is bad.
If you value plant growth, unfortunatly
new research shows that it is unlikely that plants will take in the access CO
2 and grow faster, so doesn't necessarily make a difference.
It may even limit plant growth.
The question is: what do you value?