Our consumption of meat is causing vast areas of rainforest to be cut down to grow soya beans to feed the farm animals.
Why not make an immediate impact by trying a meat free day (such as Meat Free Mondays which some schools have introduced)? Gradually help the family to accept an increasing number of meat free days each week, introducing new protein alternatives such as chickpeas and lentils, peas, beans and Tofu and other new alternatives appearing on the market.
There are also health benefits to eating non animal source protein and non dairy milks (but just be careful not to substitute with coconut which is high in saturated cholesterol!)