What has a 100% chance of happening in the next 50 years?

Approximately 4.3 births occur every second worldwide. This translates to about 260 births per minute.

Me:Current birth rate is declining. What is the future birth rate in 50 years if it continues to decline.

The current global birth rate is indeed declining. According to the United Nations, the total fertility rate (TFR) has been declining over the past few decades. The TFR is the average number of children a woman would have in her lifetime.

Assuming the decline in birth rate continues, it's difficult to predict exactly what the birth rate will be in 50 years. However, we can look at some trends and projections:

The UN projects that the global TFR will decline from 2.4 children per woman in 2020 to 2.1 children per woman by 2050.
The global population is expected to reach 9.7 billion by 2050, up from 7.9 billion in 2020.
The annual number of births is projected to decline from 140 million in 2020 to around 120 million by 2050.

Using these trends, we can make a rough estimate of the birth rate in 50 years. Let's assume the decline in birth rate continues at a steady pace.

If the TFR declines to 1.8 children per woman by 2073 (a possible scenario), the global birth rate could decline to around 80-90 million births per year.
This would translate to a birth rate of around 1.5-1.7 births per second, down from the current rate of 4.3 births per second.

Keep in mind that these are rough estimates and should be taken as a rough order of magnitude. Many factors can influence birth rates, including changes in fertility rates, population growth, and demographic trends.

Here's a rough estimate of the birth rate in 50 years, based on these assumptions:
1.5≤births per second≤1.7