Will a Billion Small Steps be Enough?

As Mao said, you start a journey with a single step. This seems to be the logic of the 'Count Us In' campaign that hopes to convince 1 billion people on the planet to sign up for small steps 'to save (the) climate' (https://www.theguardian.com/environment/2020/oct/10/campaign-seeks-1bn-people-to-save-climate-one-small-step-time). The small steps would include one or more of fitting solar panels to their homes, insulating their house, wearing clothes longer, eating local foods, cutting out meat from some meals, flying less etc. Positive action is always worthwhile but I do have some concerns with this concept. A reasonable percentage (especially the poor in less developed countries) of the 7.8 billion people on the planet, are forced to live like this anyhow (even if they have aspirations to consume more and to travel). It is estimated that the world population will reach 8 billion by 2023, so a) 1 billion is a substantial proportion of this and b) their efforts could easily be largely 'swamped' by actions of the other 7 billion. It's actually the 'rich' who currently account for most of flying and, I suspect, will be takers for 'space tourism' flights. People, if they are making a choice, easily become demotivatated when they think that someone else will be undoing all their efforts. Although its is claimed that the 1 billion signers (if they stick to their pledges), could result in global green house gases being reduced, we need more than a reduction to avert climate change. The planet actually requires a substantial reversal of the build up of carbon dioxide and methane that we have seen over decades. I appreciate that all campaigns need finance but I wonder (perhaps cynically) if the company sponsors are more interested in receiving a 'green' accolade than in actually countering global warming.