It is hard. Where?
All I've seen so far from my very quick look into this, is how he helped provide vaccines to those within the meningitis belt, or provide bags to keep out insects from eating family's crops and allowing them to grow. As for population, his comments surround the wider concern on how the rising population of Africa will counteract international efforts to help reduce poverty within the continent, providing ready healthcare, stimulating growth e.t.c. Not to mention how this also ties in to the fears and debates over overpopulation and resource consumption, especially in plastics and fossil fuels.
Of course, there's the separate issue of countries which also extract money and profit from Africa and leave the economy worse-off, but that's another issue.
However, you seem to be very confident in the assertion you've made, so I imagine you've done extensive research on this to come to such a conclusion. I'd love to see it laid out. I'll even give a Admin-permission-ticket to just post the links of your research, as long as they aren't to opinion articles or blogs. We can stick to the forum for such expressions.
