Aggregate indicators that focus on country-level analysis allow for comparison across countries but not across individuals within countries. For example, under SDG 13 on climate change, indicators related to forest area and its protection are essential, but indicators to monitor the human impact of depletion—including one that captures how women and men are affected by environmental degradation in different ways—are also important and necessary (see Chapter 3). But an assessment of gender data availability suggests there is a long way to go before this standard is met. Many of the gender-specific indicators cover 'emerging statistical areas' where measurement methodology is not well developed—this is true for one third of the gender-specific indicators.